The second orbit raising operation of South Asia Satellite has been successfully carried out by LAM Engine firing for 3529.7 sec from 09.30 hr IST on May 07, 2017
Orbit Determination results from the second LAM firing are: 1. Apogee X perigee height was changed to 35858 km X 28608 km. 2. Inclination is 0.755deg.3. Orbital period is 20hr 58min.
Is the video showing cryogenic stage igniting from a lower stage view ? Normally the upper stages show the lower stages falling off.Pointed out by a youtube viewer.
Quote from: input~2 on 05/06/2017 05:03 amUSSTRATCOM has cataloged 2 objects (epoch May 5, 13:52 UTC)2017-024A/42695 in 157 x 35936 km x 20.66°2017-024B/42696 in 154 x 35940 km x 20.65°The targetted GTO was 170±5 x 35975±675 km x 20.61±0.1°The achieved perigee appears to be lower than the tolerable limits though apogee and inclination appears to be good. Does this indicate an under-performance?
USSTRATCOM has cataloged 2 objects (epoch May 5, 13:52 UTC)2017-024A/42695 in 157 x 35936 km x 20.66°2017-024B/42696 in 154 x 35940 km x 20.65°The targetted GTO was 170±5 x 35975±675 km x 20.61±0.1°
Quote from: vineethgk on 05/06/2017 06:49 pmQuote from: input~2 on 05/06/2017 05:03 amUSSTRATCOM has cataloged 2 objects (epoch May 5, 13:52 UTC)2017-024A/42695 in 157 x 35936 km x 20.66°2017-024B/42696 in 154 x 35940 km x 20.65°The targetted GTO was 170±5 x 35975±675 km x 20.61±0.1°The achieved perigee appears to be lower than the tolerable limits though apogee and inclination appears to be good. Does this indicate an under-performance?In fact the payload is 24B. The quoted orbit of 154 x 35940 km is from the time-averaged SGP4 TLE elements; when you calculate the actual perigee of that orbit it's actually 168 km (geodetic height).There's a new elset today showing 24B in an SGP4 orbit of 5598 x 35988 km x 10.38 deg.
The third orbit raising operation of South Asia Satellite has been successfully carried out by LAM Engine firing for 445.8 sec from 06:51:52 hr IST on May 08, 2017
Deployment of East and West reflectors have been successfully completed at 08:15 hr IST and 09:30 hr IST, respectively on May 08, 2017
From SAC Annual Report 2015-16 GSAT-9 is a Ku-Band satellite configured to provide communication services over SAARC countries. It consists of 12 Ku band transponders. The payload configuration was modified for the revised spectrum allocation of 13.00-13.25 GHz/11.20 GHz. GSAT-9 has 12 Ku-band channels providing services for VSAT/DTH with South Asia coverage, It also has a Ku beacon transmitter with 480E/97.3E
and drift rate has increased from .48 deg east/day to .75 ( being 58 kms below GEO height )May now be racing to 48E